Improvement in non-condensing illuminating vault-covers



T.HYATT. I Non-Condensing Illuminating Vault-Covers. No. 145,204. IPatented Dec.2,1873

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UNITED STATES PATENT OFFICE.

THADDEUS HYATT, OF NEW YORK, N. Y., ASSIGNOR TO ELIZABETH A. L. HYATT,OF SAME PLACE.

IMPROVEMENT IN NON-CONDENSING ILLUMINATING VAULT-COVERS.

Specification forming part of Letters Patent No. 145,204, dated December2, 1873; application filed October 22, 1873.

CASE 13.

To all whom it may concern:

Be it known that I, THADDEUS HYATT, of New York, in the county of NewYork and in the State of New York, have invented certain new and usefulImprovements in Non-Oondensing Eliminating-Gratings; and do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawing making a partof this specification, in which- Figure l is a plan View of the upperside of a tile constructed in accordance with my improved method, andFig. 2 is a vertical section of the same upon a line passing through thecenters of a row of illuminating-lenses.

Letters of like name and kind refer to like parts in each of thefigures.

My invention has for its object the production of pavement-tiles, vaultand area covers, &c., which, while cheap, substantial, fire-proof, andpossessing all necessary strength and durability, shall be poorconductors of heat, cold, and sound; and to this end it consists in atile composed of a sheet-metal casing inclosing a wooden center,substantially as and for the purpose hereinafter specified.

In the annexed drawing, A represents the upper and A the lower side of acasing c011- structed of or from sheet metal, the edges of which sidesare turned toward and united to each other, as shown. Within the spaceleft between the plates A and A is 2.- correspondingly-shaped piece ofwood, B, which wood but is preferably Burnetized, or otherwise protectedagainst decay, the whole thus combined having any shape and sizerequired, and presenting the appearance of an ordinary tile. A number oflight-openings, a, are provided at suitable points within the tile, andin such openings are set corresponding illuminatinglenses, 0, in anydesired manner. The openings a. may simply pass-through the plates A andA and wooden center B, or they may be permanently inclosed at theirsides by metal thimbles, soldered or otherwise secured at their ends toor upon the contiguous portions of said plate.

The tile thus constructed is practically fireproof,it beingimpracticable for its wooden center to burn while the sheet-metalcovering remains. It is non-sweating by reason of the low heat and coldtransmitting qualities of its center. It transmits but slightly thesounds upon either side. It weighs but little, and is therefore capableof use in places where the weight of cast-iron would be objectionable.It is durable, and can be furnished at a comparatively small cost.

Having thus fully set forth the nature and merits of my invention, whatI claim as new is A tile composed of a sheet-metal casing inclosing awooden center, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this26th day of July, 1873.

THADDEUS HYATT. lVitnesses:

AMBRosE MoNELL, CHARLES SPYR.

